@Mame,
I've only had one roommate besides my husband, and I'm still glad she's gone, gone, gone, drama not to revisit. So, what, I speak as a neophyte in roommate land.
So, I'll timorously venture that to be straightforward is useful.
I figure that by now I'd be a bitch of a roommate - anyone of some accrued years might have gained in a sense of what makes them comfortable in the home.